unshar(1)

unshar(1) User Commands unshar(1)
NAME
unshar - unpack a shar archive
SYNOPSIS
unshar [-flags] [-flag [value]] [--option-name[[=| ]value]] [<file>...]
The operands that this program operates on may be specified either on
the command line or read from standard input, one per line. In that
input, leading and trailing white space is stripped, blank lines are
ignored. Standard input may not be a terminal.
DESCRIPTION
Unshar scans the input files (typically email messages) looking for the
start of a shell archive. If no files are given, then standard input
is processed instead. It then passes each archive discovered through
an invocation of the shell program to unpack it.
This program will perform its function for every file named on the com-
mand line or every file named in a list read from stdin. The arguments
or input names must be pre-existing files. The input list may contain
comments, which are blank lines or lines beginning with a '#' charac-
ter.
OPTIONS
-d dir, --directory=dir
unpack into the directory dir.
The input file names are relative to the current directory when
the program was started. This option tells unshar to insert a
cd <dir> commad at the start of the shar text written to the
shell.
-c, --overwrite
overwrite any pre-existing files.
This option is passed through as an option to the shar file.
Many shell archive scripts accept a -c argument to indicate that
existing files should be overwritten.
-f, --force
This is an alias for the --overwrite option.
-E split-mark, --split-at=split-mark
split input on split-mark lines. The default split-mark for
this option is:
exit 0
With this option, unshar isolates each different shell archive
from the others which have been placed in the same file, unpack-
ing each in turn, from the beginning of the file to the end.
Its proper operation relies on the fact that many shar files are
terminated by a readily identifiable string at the start of the
last line.
For example, noticing that most `.signatures' have a double
hyphen ("--") on a line right before them, one can then some-
times use --split-at=--. The signature will then be skipped,
along with the headers of the following message.
-e, --exit-0
split input on "exit 0" lines. This option must not appear in
combination with any of the following options: split-at.
Most shell archives end with a line consisting of simply "exit
0". This option is equivalent to (and conflicts with) --split-
at="exit 0".
-D, --debug
debug the shell code.
"set -x" will be emitted into the code the shell interprets.
-h, --help
Display usage information and exit.
-!, --more-help
Pass the extended usage information through a pager.
-R [cfgfile], --save-opts [=cfgfile]
Save the option state to cfgfile. The default is the last con-
figuration file listed in the OPTION PRESETS section, below.
The command will exit after updating the config file.
-r cfgfile, --load-opts=cfgfile, --no-load-opts
Load options from cfgfile. The no-load-opts form will disable
the loading of earlier config/rc/ini files. --no-load-opts is
handled early, out of order.
-v [{v|c|n --version [{v|c|n}]}]
Output version of program and exit. The default mode is `v', a
simple version. The `c' mode will print copyright information
and `n' will print the full copyright notice.
OPTION PRESETS
Any option that is not marked as not presettable may be preset by load-
ing values from configuration ("RC" or ".INI") file(s). The file
"$HOME/.sharrc" will be used, if present.
FILES
See OPTION PRESETS for configuration files.
EXIT STATUS
One of the following exit values will be returned:
0 (EXIT_SUCCESS)
Successful program execution.
1 (EXIT_FAILURE)
There was an error in command usage.
2 (EXIT_POPEN_PROBLEM)
cannot spawn or write to a shell process
3 (EXIT_CANNOT_CREATE)
cannot create output file
4 (EXIT_BAD_DIRECTORY)
the working directory structure is invalid
5 (EXIT_NOMEM)
memory allocation failure
6 (EXIT_INVALID)
invalid input, does not contain a shar file
66 (EX_NOINPUT)
A specified configuration file could not be loaded.
70 (EX_SOFTWARE)
libopts had an internal operational error. Please report it to
autogen-users@lists.sourceforge.net. Thank you.
SEE ALSO
shar(1)
AUTHORS
The shar and unshar programs is the collective work of many authors.
Many people contributed by reporting problems, suggesting various
improvements or submitting actual code. A list of these people is in
the THANKS file in the sharutils distribution.
COPYRIGHT
Copyright (C) 1994-2015 Free Software Foundation, Inc. all rights
reserved. This program is released under the terms of the GNU General
Public License, version 3 or later.
BUGS
Please put sharutils in the subject line for emailed bug reports. It
helps to spot the message.
Please send bug reports to: bug-gnu-utils@gnu.org
NOTES
This manual page was AutoGen-erated from the unshar option definitions.
GNU sharutils (4.15.2) 30 May 2015 unshar(1)